A fetus or foetus (/ ˈ f iː t ə s /; pl.: fetuses, foetuses, rarely feti or foeti) is the unborn mammalian offspring that develops from an embryo. [1] Following the embryonic stage , the fetal stage of development takes place.

FOETUS definition: 1. a young human being or animal before birth, after the organs have started to develop: 2. a UK…. Learn more.

2017年7月6日 · Fetal development occurs between the embryonic stage of development and birth in humans. This stage begins after 11 weeks of gestation, when the embryo begins to exhibit human characteristics, and lasts until birth.

2025年3月18日 · Fetal development begins soon after conception. Find out how your baby grows and develops during the first trimester. You're pregnant. Congratulations! You'll undoubtedly spend the months ahead wondering how your baby is growing and developing. What does your baby look like? How big is he or she? When will you feel the first kick?

2023年2月21日 · Follow your baby's development week by week, from conception to labor, in these amazingly detailed, doctor-reviewed images. At the start of this week, you ovulate. Your egg is fertilized 12 to 24 hours later if a sperm penetrates it.

2024年3月19日 · There are three stages of fetal development: germinal, embryonic and fetal. Most people don’t talk about their pregnancy in these terms, but it can be helpful to know. The germinal stage is the shortest stage of fetal development. It begins at conception when a sperm and egg join in your fallopian tube.

2023年10月3日 · During pregnancy, the fertilized egg grows and develops into a fetus, a process that typically takes around nine months in humans. Medically, the exact growing stage at which we recognize a fetus is the 9th week after fertilization or the 11th week of pregnancy/gestation.